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首页> 外文期刊>Aquaculture Research >Broodstock diet with water and astaxanthin improve condition and egg output of brood fish and larval survival in Atlantic cod, Gadus morhua L.
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Broodstock diet with water and astaxanthin improve condition and egg output of brood fish and larval survival in Atlantic cod, Gadus morhua L.

机译：用水和虾青素的亲鱼饮食可以改善大西洋鳕鱼（Gadus morhua L.）的状况和产卵量，并提高仔鱼的存活率。

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摘要

Broodstock of Atlantic cod were fed with three diets; astaxanthin supplemented (100ppmkg(-1)) hydrated diet (30% water) (HWHAs), no additional astaxanthin supplemented (50ppmkg(-1)) hydrated diet (30% water) (HWLAs) and a control diet (50ppmkg(-1) astaxanthin and 10% water). Throughout the spawning period, eggs were collected daily and fertilization success and proportion of embryos with normal cleavage were recorded. Larvae were reared using standard culture methods. Larval growth was recorded every 10days and larval survival was recorded at 50days post hatch. In general, broodstock fed with diets containing higher water content (HWHAs and HWLAs) and higher astaxanthin (HWHAs) had higher egg production and efficiency of egg output, lower egg incubation mortality and higher larval growth and survival. Broodstock fed with higher water content diets consumed less feed compared to control group. Also, broodstock fed with HWHAs and HWLAs recovered faster in terms of body condition than the control group. The egg bound mortality of female fish was significantly higher in control broodstock compared to broodstock fed with HWHAs and HWLAs. Broodstock fed with higher astaxanthin (HWHAs) had significantly higher fertilization success than other two groups however; no differences were found in proportion embryos with normal cleavage among different groups. Larval survival was significantly higher in HWHAs broodstock compared to other two groups. Our results showed that increased water content and astaxanthin levels in the diet could improve the condition and fecundity of Atlantic cod broodstock.
机译：大西洋鳕鱼的亲鱼饲喂三种日粮。补充虾青素（100ppmkg（-1））的水合饮食（30％水）（HWHAs），不添加虾青素补充（50ppmkg（-1））的水合饮食（30％水）（HWLAs）和对照饮食（50ppmkg（-1） ）虾青素和10％的水）。在整个产卵期间，每天收集卵，并记录受精成功和卵裂正常的胚胎比例。使用标准培养方法饲养幼虫。孵化后每10天记录一次幼虫生长，孵化后50天记录幼虫存活。一般而言，饲喂含水量较高（HWHA和HWLAs）和虾青素（HWHAs）为高的日粮的亲鱼具有较高的产蛋量和产蛋效率，较低的卵孵化死亡率以及较高的幼虫生长和存活率。与对照组相比，饲喂含水量较高的亲鱼消耗的饲料更少。同样，饲喂HWHA和HWLA的亲鱼在身体状况方面比对照组恢复得更快。与饲喂HWHA和HWLA的亲鱼相比，对照亲鱼的雌性鱼类的卵结合死亡率显着更高。然而，饲喂高虾青素（HWHA）的亲鱼的受精成功率明显高于其他两组。不同组之间卵裂正常的比例胚胎之间没有差异。与其他两组相比，HWHAs亲虾的幼虫存活率明显更高。我们的结果表明，饮食中水分含量和虾青素水平的提高可以改善大西洋鳕鱼亲鱼的状况和繁殖力。

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